bluetooth: Return false for IsPresent only when bluetooth is not supported

device/bluetooth/bluetooth_adapter_mac.mm

Index: device/bluetooth/bluetooth_adapter_mac.mm
diff --git a/device/bluetooth/bluetooth_adapter_mac.mm b/device/bluetooth/bluetooth_adapter_mac.mm
index dca907ffdeac4f616fb7be80f9b5869985590224..c63eaab8d17983d02ea19d207ed31c72ea40ec85 100644
--- a/device/bluetooth/bluetooth_adapter_mac.mm
+++ b/device/bluetooth/bluetooth_adapter_mac.mm
@@ -128,8 +128,8 @@ bool BluetoothAdapterMac::IsInitialized() const {
 bool BluetoothAdapterMac::IsPresent() const {
   bool is_present = !address_.empty();
   if (IsLowEnergyAvailable()) {
-    is_present = is_present || ([low_energy_central_manager_ state] ==
-                                CBCentralManagerStatePoweredOn);
+    is_present = is_present || ([low_energy_central_manager_ state] !=
+                                CBCentralManagerStateUnsupported);
   }
   return is_present;
 }